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RING Mechanical Engineering
Published by Universitas Islam Malang
ISSN : -     EISSN : 28285174     DOI : https://doi.org/10.33474/rm.v3i1
Core Subject : Science, Engineering,
Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
RING Mechanical Engineering (RING ME) with the ISSN number 2828-5174 (online), is a multidisciplinary scientific journal published by Mechanical Engineering, Faculty of Engineering, Universitas Islam Malang. This journal contains articles in the fields of Energy Conversion, Materials, Production and Manufacturing. This jurnal is published twice a year, namely in June and December.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 52 Documents
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Electric Motor Speed Control on Trimaran Ships Based on Sliding Mode Control Ni Kadek Sri Prameswari; Edi Kurniawan; Diyah Purwitasari
RING ME Vol 5 No 2 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i2.24236

Abstract

Ships are a means of transportation used in maritime transport activities, yet maintaining propulsion stability and efficiency remains a critical challenge, especially for multi hull vessels such as trimarans operating under dynamic sea conditions. Conventional controllers such as PID and field oriented control (FOC) often struggle to adapt to fluctuating loads and external disturbances. This study addresses that gap by applying Sliding Mode Control (SMC) for brushless DC (BLDC) motor speed regulation on a trimaran prototype. The system employs an STM32 microcontroller integrated with voltage, current, and RPM sensors to provide real time monitoring and robust control. Both static and dynamic tests were conducted at various speed setpoints with artificial wave disturbances. The results indicate that the SMC based system effectively reduced RPM deviation from ±550 RPM in uncontrolled systems to as low as ±3–15 RPM, while current and voltage consumption remained stable within 5%. Furthermore, propulsion efficiency improved by approximately 17% compared to conventional PID control. The most stable performance was achieved at the 8000 RPM setpoint, where current consumption reached 3.9–4.1 A, lower than the 4.7 A observed in uncontrolled operation. However, system performance declined at 10,000 RPM due to nonlinear load effects. These findings demonstrate that SMC provides a robust, adaptive, and energy efficient solution for BLDC motor control in trimaran propulsion, offering significant advantages over traditional methods and serving as a foundation for further optimization in high speed applications.
ANALISIS PENGARUH VARIASI KECEPATAN PUTAR BALL MILL MACHINE TERHADAP KARAKTERISTIK UKURAN PARTIKEL MATERIAL KARBON Wildan Mufti Wirdana; Andita Nataria Fitri Ganda; Arya Mahendra Sakti; Dewi Puspitasari
RING ME Vol 5 No 2 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i2.24307

Abstract

Ukuran partikel material karbon berperan penting dalam menentukan sifat fisik, kimia, serta potensi aplikatifnya, khususnya dalam industri baterai, metalurgi serbuk, dan teknologi elektroda. Namun, penelitian terkait optimasi parameter penggilingan terutama pengaruh kecepatan putar pada proses ball mill terhadap reduksi ukuran partikel karbon masih terbatas. Studi ini bertujuan untuk mengevaluasi pengaruh variasi kecepatan putar mesin ball mill terhadap karakteristik ukuran partikel karbon yang diperoleh. Metode yang digunakan adalah eksperimen laboratorium dengan memvariasikan kecepatan putar ball mill pada 60 rpm, 100 rpm, dan 140 rpm selama durasi penggilingan 4 jam. Hasil penggilingan dianalisis menggunakan Particle Size Analyzer (PSA) untuk mengetahui distribusi ukuran partikel. Hasil menunjukkan bahwa kecepatan putar berbanding terbalik terhadap ukuran partikel. Kecepatan 60 rpm menghasilkan ukuran partikel rata-rata terkecil sebesar 24,62 nm, sedangkan pada 100 rpm ukuran rata-rata terkecil sebesar 10,00 nm. Efisiensi penghalusan ini disebabkan oleh meningkatnya energi tumbukan yang dihasilkan bola penggiling pada kecepatan tinggi. Hasil penelitian menunjukkan bahwa kecepatan putar merupakan parameter krusial dalam proses penggilingan karbon untuk menghasilkan partikel yang halus dan seragam, serta berkontribusi pada pengembangan proses produksi material karbon skala laboratorium yang efisien dan terkontrol.

Page 6 of 6 | Total Record : 52

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